ND Grads are used to balance a bright sky to the darker foreground where the cameras dynamic range would struggle to capture the data in one image.

As a general rule, soft grads perform best in woodland, mist, or interiors. Or where there is no definite transition between sky and landscape, when the horizon is uneven or interrupted, such as with hills, rocks or trees, a soft grad will gently balance exposure across the image.

ND Grads can be stacked together, or with other filters, so you can respond to almost any lighting situation.